In the fifth week, I mainly studied the production process of Unreal’s automatic plant distribution. After trying to find that this approach is not suitable for my project. Automatic allocation can indeed quickly fill the scene with plants. But its disadvantage is that the relationship between the model and the model is also random. This means that we will lose some details. By comparison, I chose to draw the plants manually.In addition, I also placed some of the scene stones.
Before making automatic allocation, usually the material should be drawn first.
LandscapeLayerSample_This node should be noted that its naming should be consistent with the name of a certain layer in LayerBlend. Then the node will extract the mask information of the corresponding layer.
Grass_This section is an output node. The input port is the calculated Alpha. The calculation method of Alpha is similar to that in Houdini.
The above picture shows the Alpha calculation method that I used. The purpose of this calculation method is to allow plants to grow in different regions. The calculation method is not unique.
In addition, the terrain grass type as shown in the figure should be created in the Grass node.
inside of Grass_A
The figure above shows the internal parameters of the terrain grass type. The places marked in red are the key points to be adjusted.
As shown in the figure, this is the effect after the material is automatically assigned. If you want to delete the plants in a part of the area, modify the method to redraw the material instead of directly editing the plants through the plant editing public. This degree of freedom is not very high. So I plan to draw the plants manually.
In addition, I also changed the texture of the stone shader.
The material shader as shown in the figure can calculate the slope. So that the material on the top of the rock is replaced with a grass shader.
Get the effect shown in the figure.
本周的最后的工作内容是对地形的编辑。我花费了很长的时间来分布这些石头。我的计划是将整个世界分为三个区域分别拥有各自不同的地貌特征。目前只完成了三分之一的地貌效果。
I am very satisfied with this week’s research. Although the automatic distribution of plants was not implemented.